public string PerformAuthentication(IdentityUser identityUser,
string loginUserName, string loginPassword,
string jwKey, string jwIssuer)
{
Notification notification = ValidateAuthentication(identityUser, loginUserName, loginPassword);
if (notification.HasErrors())
{
throw new ArgumentException(notification.ErrorMessage());
}
return(identityUser.BuildToken(jwKey, jwIssuer));
}